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Lost another cam
#1465744
07/10/13 01:11 AM
07/10/13 01:11 AM
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Joined: Feb 2003
Posts: 1,730
Red Deer, Alberta
bill_greenwood
OP
top fuel
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OP
top fuel
Joined: Feb 2003
Posts: 1,730
Red Deer, Alberta
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So...after losing a couple of lifters last year- pushrods popped through the disc on a couple of my old Comp lifters- and bending a couple pushrods, I upgraded to a set of Ferrea tool steel lifters and .145 wall chromoly pushrods. Sure enough, in spite of a diligent lifter break-in I appear to have wiped a couple of lobes. Again. The lash was still where I had set it before we went to the track, yet when relashing tonight, I discovered that one exhaust was only opening just over .400" and another was even worse. So. It's roller time. Does anyone make a small block roller lifter that literally drops in to a non-bushed block? There are two Comp Cams grinds that would allow me to use my current springs and rockers without using up my valve-piston clearance. Aaaaaargh! 
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Re: Lost another cam
[Re: mopar dave]
#1465750
07/10/13 10:23 AM
07/10/13 10:23 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Mike, I believe the comp 828 is one that leaked like a sieve. the other was a crane pro $880 set. the PBM's are non pushrod oiling.
I was running them for years in my back up W-2 engine..
always had good pressure... if you look at my lifter
post you can see them... thats at .640 lift(valve)
so if you go more you MIGHT uncover the bottom
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Re: Lost another cam
[Re: mopar dave]
#1465752
07/10/13 11:05 AM
07/10/13 11:05 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
cant remember what lift I had then,but I think it was about .650. may be more of an issue with the block. mine is a 71 360 block.
Those oil passages are sorta random to where they
end up at since its part of the casting... mine is
a 68 or 69 340 block
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Re: Lost another cam
[Re: MR_P_BODY]
#1465753
07/10/13 01:58 PM
07/10/13 01:58 PM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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The Comp 828's require grinding on the block. Comp 8043's have the inverted link bar and will clear.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: Lost another cam
[Re: Triple Threat]
#1465756
07/11/13 10:44 AM
07/11/13 10:44 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
The Comp 828's require grinding on the block. Comp 8043's have the inverted link bar and will clear.
I did very little grinding to get them to fit... I
did some grinding on the heads so I could make sure I
could get them all out with the heads on.. thats a must
for DW... just in case
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Re: Lost another cam
[Re: bill_greenwood]
#1465757
07/11/13 03:11 PM
07/11/13 03:11 PM
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Joined: Feb 2008
Posts: 452
Monrovia, So-Cal, USA
racerhog
mopar
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mopar
Joined: Feb 2008
Posts: 452
Monrovia, So-Cal, USA
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Get rid of the Pennzoil..... I lost 2 motors from there crap... And 4 motors from Union 76's crap.. I went to Kendall and never looked back... Just my 2 cents. Oh and I run Castrol in all street cars.... 
Last edited by racerhog; 07/11/13 03:11 PM.
Bob(Cowboy)Hogan
Monrovia So-Cal
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Re: Lost another cam
[Re: mopar dave]
#1465759
07/11/13 04:08 PM
07/11/13 04:08 PM
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Joined: Feb 2005
Posts: 20,185
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,185
PA.
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Kendal oil years ago now called Brad Penn. 20-50 or 10-30 to get my pressure dialed in and never lost a solid cam in 38 years. Never even removed the inner spring for breakin but if the cam was over 600 lift I would recommend that step. Matt's solid cam is on its third rebuild (7 plus years) of racing every weekend from May to the middle of November.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Lost another cam
[Re: bill_greenwood]
#1465760
07/11/13 05:27 PM
07/11/13 05:27 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Quote:
I use Pennzoil 20w50 race oil, plus applied copious amounts of cam break-in lube on lifters and lobes. If there's an upside, I have enough spring to upgrade to a mild roller, and shouldn't really need to go to a bronze dist. gear. I'm more annoyed than anything. This was supposed to be at least as low maintenance as my old 340 car, and I will be pulling the motor for the fifth time in 7 years......
IMO, you never solved the problem from the first cam failure. Are the lifters / lobes that failed on the same lifter bores for both failures? Look closely at the sides of the lifters that failed for vertical scratching that the other lifters don't have. You might consider burnishing the lifter bores. Excessive spring pressure, worn out lifter bores, dirt, lack of lube, improper break-in, can all be causes, but IMO, the lifers that failed weren't turning in the lifter bores - as being the most likely.
Fastest 300
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Re: Lost another cam
[Re: bill_greenwood]
#1465761
07/11/13 06:31 PM
07/11/13 06:31 PM
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Joined: Aug 2003
Posts: 43,228
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
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Quote:
I use Pennzoil 20w50 race oil, plus applied copious amounts of cam break-in lube on lifters and lobes. If there's an upside, I have enough spring to upgrade to a mild roller, and shouldn't really need to go to a bronze dist. gear. I'm more annoyed than anything. This was supposed to be at least as low maintenance as my old 340 car, and I will be pulling the motor for the fifth time in 7 years......
With all the cam troubles you've had why would you even thnk of not running either a bronze or phenolic distributor drive gear    Same thing on the springs, to little, not enough, spring pressure kills roller liftesr    When we, you and me, cut corners, Mr Murphy will kick our tails  Do it correctly once  BTW,sorry for your cam troubles   If you race long enough you will have parts fail  BTW, I would shoot for 250 lbs on the seats and at least 550 lbs opened over the nose of the cam, max lift. Best bet is to follow the cam makers recommendations on spring pressures.
Last edited by Cab_Burge; 07/11/13 11:38 PM.
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Re: Lost another cam
[Re: Crizila]
#1465763
07/12/13 01:40 AM
07/12/13 01:40 AM
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Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
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Quote:
Quote:
I use Pennzoil 20w50 race oil, plus applied copious amounts of cam break-in lube on lifters and lobes. If there's an upside, I have enough spring to upgrade to a mild roller, and shouldn't really need to go to a bronze dist. gear. I'm more annoyed than anything. This was supposed to be at least as low maintenance as my old 340 car, and I will be pulling the motor for the fifth time in 7 years......
IMO, you never solved the problem from the first cam failure. Are the lifters / lobes that failed on the same lifter bores for both failures? Look closely at the sides of the lifters that failed for vertical scratching that the other lifters don't have. You might consider burnishing the lifter bores. Excessive spring pressure, worn out lifter bores, dirt, lack of lube, improper break-in, can all be causes, but IMO, the lifers that failed weren't turning in the lifter bores - as being the most likely.
Kevin
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